Shield

(Player's Handbook v.3.5, page 278, DnD 3.5)

Abjuration[Force]

Level: ; Sorcerer/Wizard 1; Knight of the Weave 1; Wu Jen 1; Sha'ir 1; Death Master 1; Savant 1
Components: V, S
Casting Time: 1 standard action
Range: Personal
Target: You
Duration: 1 min./level (D)

Shield creates an invisible, tower shield-sized mobile disk of force that hovers in front of you.
It negates magic missile attacks directed at you.
The disk also provides a +4 shield bonus to AC.
This bonus applies against incorporeal touch attacks, since it is a force effect.
The shield has no armor check penalty or arcane spell failure chance.
Unlike with a normal tower shield, you can't use the shield spell for cover.